<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 数据报表 -->
            <div id="main" style="width:750px;height:400px;"></div>
        </el-card>
    </div>
</template>
<script>
// 导入echarts
import echarts from 'echarts'
// 导入lodash
import _ from 'lodash'
export default {
  data () {
    return {
      // 需要跟请求的折线图数据合并的options
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [{
          boundaryGap: false
        }],
        yAxis: [{
          type: 'value'
        }]
      }

    }
  },
  created () {
  },
  async mounted () {
    // 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'))
    // 准备数据和配置项 //发送请求获取折线图数据
    const { data: res } = await this.$axios.get('reports/type/1')
    if (res.meta.status !== 200) {
      return this.$message.error('获取折线图数据失败')
    };
    // 合并res.data和this.options
    const result = _.merge(res.data, this.options)
    // 使用获取的数据展示图表
    myChart.setOption(result)
  },
  methods: {
  }
}
</script>

<style lang="less" scoped>

</style>
